./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:17:10,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:17:10,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:17:10,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:17:10,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:17:10,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:17:10,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:17:10,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:17:10,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:17:10,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:17:10,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:17:10,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:17:10,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:17:10,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:17:10,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:17:10,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:17:10,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:17:10,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:17:10,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:17:10,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:17:10,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:17:10,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:17:10,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:17:10,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:17:10,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:17:10,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:17:10,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:17:10,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:17:10,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:17:10,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:17:10,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:17:10,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:17:10,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:17:10,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:17:10,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:17:10,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:17:10,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:17:10,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:17:10,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:17:10,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:17:10,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:17:10,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:17:10,955 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:17:10,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:17:10,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:17:10,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:17:10,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:17:10,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:17:10,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:17:10,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:17:10,960 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:17:10,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:17:10,961 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:17:10,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:17:10,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:17:10,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:17:10,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:17:10,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:17:10,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:17:10,962 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:17:10,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:17:10,963 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:17:10,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:17:10,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:17:10,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:17:10,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:17:10,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:17:10,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:17:10,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:17:10,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:17:10,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:17:10,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:17:10,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:17:10,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:17:10,965 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:17:10,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:17:10,966 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:17:10,966 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:17:11,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:17:11,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:17:11,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:17:11,347 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:17:11,347 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:17:11,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-31 00:17:12,728 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:17:13,024 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:17:13,024 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-31 00:17:13,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6c1b04b/c7e6e01b058a4527b359487ad1b583f5/FLAG46bf85e6b [2023-08-31 00:17:13,070 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6c1b04b/c7e6e01b058a4527b359487ad1b583f5 [2023-08-31 00:17:13,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:17:13,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:17:13,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:17:13,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:17:13,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:17:13,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f57b8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13, skipping insertion in model container [2023-08-31 00:17:13,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:17:13,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:17:13,565 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2023-08-31 00:17:13,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:17:13,604 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:17:13,655 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2023-08-31 00:17:13,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:17:13,713 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 00:17:13,718 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:17:13,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13 WrapperNode [2023-08-31 00:17:13,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:17:13,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:17:13,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:17:13,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:17:13,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,767 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-08-31 00:17:13,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:17:13,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:17:13,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:17:13,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:17:13,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:17:13,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:17:13,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:17:13,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:17:13,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (1/1) ... [2023-08-31 00:17:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:17:13,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:17:13,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:17:13,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:17:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:17:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:17:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:17:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:17:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:17:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:17:13,901 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:17:14,053 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:17:14,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:17:14,376 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:17:14,383 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:17:14,383 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-31 00:17:14,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:17:14 BoogieIcfgContainer [2023-08-31 00:17:14,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:17:14,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:17:14,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:17:14,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:17:14,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:17:13" (1/3) ... [2023-08-31 00:17:14,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4534274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:17:14, skipping insertion in model container [2023-08-31 00:17:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:17:13" (2/3) ... [2023-08-31 00:17:14,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4534274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:17:14, skipping insertion in model container [2023-08-31 00:17:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:17:14" (3/3) ... [2023-08-31 00:17:14,392 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-31 00:17:14,399 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:17:14,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:17:14,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:17:14,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:17:14,463 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:17:14,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 145 transitions, 298 flow [2023-08-31 00:17:14,566 INFO L130 PetriNetUnfolder]: 24/182 cut-off events. [2023-08-31 00:17:14,566 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:17:14,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 24/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 486 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-31 00:17:14,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 145 transitions, 298 flow [2023-08-31 00:17:14,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 140 transitions, 285 flow [2023-08-31 00:17:14,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:14,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-31 00:17:14,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 140 transitions, 285 flow [2023-08-31 00:17:14,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 140 transitions, 285 flow [2023-08-31 00:17:14,619 INFO L130 PetriNetUnfolder]: 23/177 cut-off events. [2023-08-31 00:17:14,619 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:14,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 23/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 478 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-31 00:17:14,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 5332 [2023-08-31 00:17:17,986 INFO L134 LiptonReduction]: Checked pairs total: 11408 [2023-08-31 00:17:17,987 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-31 00:17:18,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:18,006 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cd93ee2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:18,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:18,012 INFO L130 PetriNetUnfolder]: 0/17 cut-off events. [2023-08-31 00:17:18,012 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:17:18,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:18,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:17:18,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:18,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -317765364, now seen corresponding path program 1 times [2023-08-31 00:17:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:18,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164719458] [2023-08-31 00:17:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:18,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:17:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:18,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:17:18,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:17:18,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:17:18,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:17:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:17:18,254 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 00:17:18,257 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:17:18,257 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:17:18,293 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:17:18,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,388 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-31 00:17:18,388 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:17:18,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-31 00:17:18,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,395 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:18,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,396 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 209 transitions, 436 flow [2023-08-31 00:17:18,435 INFO L130 PetriNetUnfolder]: 45/307 cut-off events. [2023-08-31 00:17:18,436 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:17:18,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 307 events. 45/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1043 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-31 00:17:18,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-08-31 00:17:21,827 INFO L134 LiptonReduction]: Checked pairs total: 53799 [2023-08-31 00:17:21,828 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-31 00:17:21,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:21,834 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cd93ee2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:21,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:21,841 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-31 00:17:21,842 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:17:21,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:17:21,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:21,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1168505782, now seen corresponding path program 1 times [2023-08-31 00:17:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324562583] [2023-08-31 00:17:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324562583] [2023-08-31 00:17:21,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324562583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:21,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:21,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:21,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564101014] [2023-08-31 00:17:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:21,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:21,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:22,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 349 [2023-08-31 00:17:22,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:22,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:22,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 349 [2023-08-31 00:17:22,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:23,356 INFO L130 PetriNetUnfolder]: 8909/14827 cut-off events. [2023-08-31 00:17:23,356 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-31 00:17:23,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28666 conditions, 14827 events. 8909/14827 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 107506 event pairs, 3944 based on Foata normal form. 1745/14781 useless extension candidates. Maximal degree in co-relation 1901. Up to 13678 conditions per place. [2023-08-31 00:17:23,431 INFO L137 encePairwiseOnDemand]: 319/349 looper letters, 66 selfloop transitions, 2 changer transitions 9/93 dead transitions. [2023-08-31 00:17:23,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 356 flow [2023-08-31 00:17:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:17:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:17:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-31 00:17:23,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600764087870105 [2023-08-31 00:17:23,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-31 00:17:23,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-31 00:17:23,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:23,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-31 00:17:23,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:23,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:23,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:23,462 INFO L175 Difference]: Start difference. First operand has 74 places, 100 transitions, 218 flow. Second operand 3 states and 629 transitions. [2023-08-31 00:17:23,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 356 flow [2023-08-31 00:17:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:17:23,470 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 150 flow [2023-08-31 00:17:23,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-08-31 00:17:23,475 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-08-31 00:17:23,476 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 150 flow [2023-08-31 00:17:23,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:23,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:23,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:17:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:17:23,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:23,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1519777946, now seen corresponding path program 1 times [2023-08-31 00:17:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:23,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736180721] [2023-08-31 00:17:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:23,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:23,517 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:17:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:23,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:17:23,559 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:17:23,559 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:17:23,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:17:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:17:23,560 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:17:23,561 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:17:23,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:17:23,595 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:17:23,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,672 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-31 00:17:23,673 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:17:23,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-31 00:17:23,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:23,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 273 transitions, 576 flow [2023-08-31 00:17:23,735 INFO L130 PetriNetUnfolder]: 71/463 cut-off events. [2023-08-31 00:17:23,735 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:17:23,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 463 events. 71/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1761 event pairs, 1 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-31 00:17:23,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 41664 [2023-08-31 00:17:27,402 INFO L134 LiptonReduction]: Checked pairs total: 123367 [2023-08-31 00:17:27,403 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-31 00:17:27,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:27,406 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cd93ee2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:27,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:27,409 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-31 00:17:27,410 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:17:27,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:17:27,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:27,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1553709985, now seen corresponding path program 1 times [2023-08-31 00:17:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349238711] [2023-08-31 00:17:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:27,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:27,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349238711] [2023-08-31 00:17:27,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349238711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:27,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:27,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:27,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927348740] [2023-08-31 00:17:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:27,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:27,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 450 [2023-08-31 00:17:27,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:27,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:27,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 450 [2023-08-31 00:17:27,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:47,834 INFO L130 PetriNetUnfolder]: 199858/297590 cut-off events. [2023-08-31 00:17:47,835 INFO L131 PetriNetUnfolder]: For 3619/3619 co-relation queries the response was YES. [2023-08-31 00:17:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570590 conditions, 297590 events. 199858/297590 cut-off events. For 3619/3619 co-relation queries the response was YES. Maximal size of possible extension queue 7608. Compared 2640065 event pairs, 121992 based on Foata normal form. 36172/301896 useless extension candidates. Maximal degree in co-relation 26003. Up to 270400 conditions per place. [2023-08-31 00:17:49,085 INFO L137 encePairwiseOnDemand]: 409/450 looper letters, 80 selfloop transitions, 2 changer transitions 10/119 dead transitions. [2023-08-31 00:17:49,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 450 flow [2023-08-31 00:17:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:17:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:17:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2023-08-31 00:17:49,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962962962962963 [2023-08-31 00:17:49,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2023-08-31 00:17:49,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2023-08-31 00:17:49,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:49,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2023-08-31 00:17:49,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:49,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:49,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:49,101 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 304 flow. Second operand 3 states and 805 transitions. [2023-08-31 00:17:49,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 450 flow [2023-08-31 00:17:49,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 119 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:17:49,109 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 211 flow [2023-08-31 00:17:49,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2023-08-31 00:17:49,111 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2023-08-31 00:17:49,111 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 211 flow [2023-08-31 00:17:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:49,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:49,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:17:49,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:17:49,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:49,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1750353972, now seen corresponding path program 1 times [2023-08-31 00:17:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:49,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850460954] [2023-08-31 00:17:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:49,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850460954] [2023-08-31 00:17:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850460954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:17:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780228408] [2023-08-31 00:17:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:49,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:17:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:17:49,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:17:49,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:17:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:49,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:17:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:17:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:49,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:17:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:49,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780228408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:17:49,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:17:49,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:17:49,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915660983] [2023-08-31 00:17:49,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:17:49,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:17:49,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:49,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:17:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:17:49,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 450 [2023-08-31 00:17:49,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 222.57142857142858) internal successors, (1558), 7 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:49,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:49,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 450 [2023-08-31 00:17:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:17:53,545 INFO L130 PetriNetUnfolder]: 41059/64415 cut-off events. [2023-08-31 00:17:53,546 INFO L131 PetriNetUnfolder]: For 21150/21150 co-relation queries the response was YES. [2023-08-31 00:17:53,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142350 conditions, 64415 events. 41059/64415 cut-off events. For 21150/21150 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 536401 event pairs, 1530 based on Foata normal form. 5220/66838 useless extension candidates. Maximal degree in co-relation 9639. Up to 39168 conditions per place. [2023-08-31 00:17:53,927 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 162 selfloop transitions, 4 changer transitions 0/192 dead transitions. [2023-08-31 00:17:53,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 192 transitions, 747 flow [2023-08-31 00:17:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:17:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:17:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1489 transitions. [2023-08-31 00:17:53,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514814814814815 [2023-08-31 00:17:53,933 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1489 transitions. [2023-08-31 00:17:53,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1489 transitions. [2023-08-31 00:17:53,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:17:53,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1489 transitions. [2023-08-31 00:17:53,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 248.16666666666666) internal successors, (1489), 6 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:53,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:53,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:53,944 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 211 flow. Second operand 6 states and 1489 transitions. [2023-08-31 00:17:53,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 192 transitions, 747 flow [2023-08-31 00:17:53,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 192 transitions, 739 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 00:17:53,982 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 201 flow [2023-08-31 00:17:53,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-08-31 00:17:53,984 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -6 predicate places. [2023-08-31 00:17:53,984 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 201 flow [2023-08-31 00:17:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.57142857142858) internal successors, (1558), 7 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:53,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:53,986 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:17:53,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:17:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:17:54,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:54,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1456078674, now seen corresponding path program 1 times [2023-08-31 00:17:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126593516] [2023-08-31 00:17:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:54,238 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:17:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:17:54,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:17:54,255 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:17:54,255 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:17:54,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:17:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:17:54,255 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:17:54,256 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:17:54,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:17:54,296 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:17:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,378 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-08-31 00:17:54,379 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:17:54,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-08-31 00:17:54,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,399 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:17:54,399 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 337 transitions, 718 flow [2023-08-31 00:17:54,479 INFO L130 PetriNetUnfolder]: 109/683 cut-off events. [2023-08-31 00:17:54,480 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:17:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 109/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2924 event pairs, 6 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-08-31 00:17:54,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 71672 [2023-08-31 00:17:58,292 INFO L134 LiptonReduction]: Checked pairs total: 241720 [2023-08-31 00:17:58,293 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-31 00:17:58,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:17:58,295 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cd93ee2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:17:58,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:17:58,297 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-31 00:17:58,298 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:17:58,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:17:58,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:17:58,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:17:58,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:17:58,299 INFO L85 PathProgramCache]: Analyzing trace with hash 658685046, now seen corresponding path program 1 times [2023-08-31 00:17:58,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:17:58,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449289611] [2023-08-31 00:17:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:17:58,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:17:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:17:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:17:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:17:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449289611] [2023-08-31 00:17:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449289611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:17:58,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:17:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:17:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744918287] [2023-08-31 00:17:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:17:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:17:58,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:17:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:17:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:17:58,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 549 [2023-08-31 00:17:58,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 176 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:17:58,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:17:58,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 549 [2023-08-31 00:17:58,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand